Road-grading machine.



' 0. D. PARK.

ROAD GRADING moms.

APPLICATION FILED JULY 18, 1911. 1 ,028,060. Patented May 28, 1912.

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O. D. PARK. ROAD GRADING MACHINE. APPLICATION FILED JULY 18, 1911.

1 ,O28,060. Patented May 28, 1912.

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ORVA D. PARK, OF MOUNT STERLING, IOWA.

ROAID- GRADING MACHINE.

To all whom it may concern Be it known that I, ORVA D. PARK, a citizen of the United States, residing at Mount Sterling, in the county of Van Buren and State of Iowa, have invented new and useful Improvements in Road-Grading Machines, of which the following is a specification.

The invention relates to road scrapers, and more particularly to the class of road grading machines.

The primary object of the invention is the provision of a machine in which the scraper blade may be angularly adjusted with respect to the line of draft, and also raised and lowered relative to the road bed for the proper grading thereof.

Another object of the invention is the provision of a machine of this character in which the scraping blade is mounted upon a turn-table supported by the frame of the machine, the supporting wheels for the frame being vertically adjustable for raising and lowering the scraping blade relative to the ground, the supporting wheels being mounted in the frame, whereby they may be turned for the proper guiding of the machine in its line of draft.

A further object of the invention is to provide a machine of this class which shall possess superior advantages in point of simplicity, durability, and general efiiciency; and with these and other ends in view, which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the accompanying drawings, has been illustrated a simple and preferred form of embodiment of the invention, it being understood, however, that changes, variations, and modifications may be made therein, such as come properly within the scope of the appended claims, without departing from the spirit of the invention, or sacrificing any of its advantages.

In the drawings: Figure 1 is a top plan view of a road grader constructed in accordance with the invention. Fig. 2 is a side elevation thereof. Fig. 3 is a vertical longitudinal sectional view. Fig. 4 is a front elevation. Fig. 5 is a rear elevation. Fig. 6 is a perspective view of one of the rear supporting wheels, showing in detail Specification of Letters Patent.

Application filed July 18, 1911.

Patented May 28,1912.

Serial No. 639,127.

the manner of connecting the same with the frame of the machine, and also the latch for holding it in adjusted position.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

Referring to the drawings by numerals, the machine comprises a frame, including side rails 10, front and rear end rails 11 and 12, respectively, the rails being united at adjacent ends in any suitable manner to form a rigid structure. At the front and rear corners of the frame are fixed brackets 13 provided with vertical sleeves 14, in which are rotatably mounted turning collars 15, the same being formed with vertically disposed squared bores, in which are fitted correspondingly shaped vertical stems 16 of front and rear forks l7 and 18, respectively, in which are journaled the usual ground or supporting wheels 19 adapted to support the frame elevated a distance above the ground. The sleeves 14 at the front of the frame are provided with elongated slots 20, through which project arms 21, the latter being journaled in the said sleeves, and to the outer ends of the arms 21 is connected a union bar or rod 22, to which is medially connected a draft pole or tongue 23, the inner end of which is connected to a bracket 24 through the medium of a pivot 25, the said bracket 24 being fixed medially to the front rail 11 on the frame. The arms 21 are formed integral with or suitably fixed to the collars 15 and project outwardly therefrom.

It will be evident that on swinging the tongue or pole 23 in opposite directions, the front forks 17 may be turned for the guiding of the machine.

Suitably fixed to the upper ends of the stems 16 are heads 26, the said upper ends of the stems being rounded, as at 27, with which are engaged the limbs 28 of yokes 29, the said limbs being connected to the stems 16 at their rounded portion. 27 on opposite sides of the heads 26. These yokes 29 are pivotally connected to links 30 which are also pivotally connected to raising and low ering levers 31 fulcrumed, as at 32, in verti cal bearings or posts 33 fixed to and rising from the side rail 10 of the frame. Thus, it will be seen that upon depressing the said levers 31, the stems 16 of the front and rear forks 17 and 18 will be raised or vertically adjusted in the collars 15, and therebylower the frame toward the ground. Should it be desired to elevate the frame, the levers 31 will be raised, thereby adjusting the stems 16 of the front and rear forks 17 and 18 in the reverse direction, thus raising the frame from the ground. Fixed or mounted upon the side rails 10 of the frame, adjacent to the handle portions of the levers 31, are toothed keeper racks 34, with which engage the said levers 31, thereby holding the same locked in adjusted position and also the frame.

Formed integral with or fixedly connected to the upper ends of the collars 15 mounted in the sleeves 14 at the rear end of the frame are peripherally notched disks 35, the same being provided with squared central openings receiving the stems 16 of the rear forks 18, and engaged in the notches of the disks 35 are latches or locking dogs 36, the same being connected with the rear end rail 12 by means of pivots 37, whereby the said latches or dogs may be thrown into and out of engagement with the disks, and in this manner the collars 15 may be rotatably adjusted, thus sustaining the rear supporting wheels turned for the guiding of the rear end of the frame. The stem 16 of the rear forks 18 have fixed thereon turning handles 38, thus permitting the said stems 1G to be turned at the will of the operator of'the machine.

Spaced from the front and rear end rails 11 and 12 of the frame, and secured to the under faces of the side rails 10 thereof are cross bars 39, to which are coimected, medially thereof, and also to said side rails 10 of the frame, the cars 40 of a circular-shaped stationary supporting track 41 for a turntable, comprising upper and lower annulii or rings 42 and 43, respectively, which frictionally engage opposite sides of the track 41 the rings being provided with alining reinforcing cross webs 45, to which are riveted or otherwise secured the rear downwardly diverging braces 46 of a road scraping blade 47, the latter carrying at its upper edge brackets 48, which are fixed to the lower ring 43 and its web 45, thereby securely connecting the said scrapingblade 47 to the turn-table. Thus, it will be seen that the said blade may be shifted to the desired angular disposition across the road bed on the shifting of the turn-table upon the track, thereby forcing the dirt scraped from the road bed by the blade to one side of the line of draft of the machine.

Upon raising or lowering the frame of the machine, the scraping blade 47 may be positioned with respect to the road bed, so as to effect a deep or shallow cutting action thereon, thus giving the proper surface to the road bed, as the machine is advanced.

Provided in the track 41 is a series of openings 49, and likewise provided in the upper and lower rings 42 and 43 are alining openings 50, which are adapted for registration with the openings 49, and engageable frame, brackets fixed to the corners thereof and having vertical sleeves, collars rotatably mounted in the sleeves, wheel forks slidable .in the collars and rotatable therewith, ground whee-ls ournaled in the forks, arms projecting forwardly from the wheel forks at the front of the frame, a tongue pivotally connected with the frame at the front thereof, a uniting bar pivoted to the tongue and to the forwardly projecting arms for turning the front forks in unison, and means for locking the forks at the rear end of the frame against turning movement.

2. A road grading machine, comprising a frame, brackets fixed to the corners thereof and having vertical sleeves, collars rotatably mounted in the sleeves, wheel forks slidable in the collars and rotatable therewith, ground wheels journa-led in the forks, arms projecting forwardly from the wheel forks at the front of the frame, a tongue pivotally connected with the frame at the front thereof, a uniting bar pivoted to the tongue and to the forwardly projecting arms for turning the front forks in unison, means for looking the forks at the rear end of the frame against turning movement, and means for raising and lowering each of said forks.

In testimony whereof I affix my signature in presence of two witnesses.

ORVA D. PARK.

WVitnesses E. J. PARSONS, D. S. ALLEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington. D. C." 1 

